ØDoor chain, a type of security chain
on a door that makes it possible to open a door from the inside while still
making it difficult for someone outside to force their way inside

ØKeychain, a small chain that connects
a small item to a key ring

ØLead shank (or "Stud
chain"), used on horses that are misbehaving

ØLavatory chain, the chain attached to
the cistern of an old-fashioned W.C. in which the flushing power is obtained by
a gravity feed from above-head height. Although cisterns no longer work like
that, the phrase "pull the chain" is still encountered to mean
"flush the toilet".

ØO-ring chain, a specialized type of
roller chain

ØRoller chain, the type of chain most
commonly used for transmission of mechanical power on bicycles, motorcycles,
and in industrial and agricultural machinery